Christofidou, K.A. orcid.org/0000-0002-8064-5874, Pang, H.T., Li, W. et al. (4 more authors) (2020) Microstructural control and optimization of Haynes 282 manufactured through laser powder bed fusion. In: Superalloys 2020 : Proceedings of the 14th International Symposium on Superalloys. 14th International Symposium on Superalloys 2020 Minerals, Metals & Materials Series . Springer International Publishing , pp. 1014-1023. ISBN 9783030518332
Abstract
The microstructure and properties of alloy Haynes 282 produced through laser powder bed fusion were investigated as a function of the post-deposition heat-treatment. Scanning electron microscopy and X-ray diffraction were utilized to characterize the microstructure, whilst electro-thermal mechanical testing was used to evaluate the tensile and creep properties at 900 °C. In the as-deposited state, the initial microstructure consisted of the γ and γʹ phases along with M6C and M23C6 carbides. These carbides were observed to govern the recrystallization behaviour of the material and resulted in a minimum recrystallization temperature of 1240 °C. Following post-deposition heat-treatments, the microstructures consisted of a monomodal distribution of γʹ with M6C and M23C6 carbides along the grain boundaries. Tertiary γʹ particles were found to form in the vicinity of carbides in samples that employed a γʹ super-solvus step prior to ageing at 788 °C. The tensile properties were found to be similar in all heat-treated states, consistent with the minimal differences observed in the microstructures. In contrast, significant differences in the creep behaviour of the alloy were observed following the different heat-treatments, although no correlation with the microstructures was observed.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Minerals, Metals & Materials Society. This is an author-produced version of a paper subsequently published in Superalloys 2020. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Haynes 282; laser powder bed fusion; mechanical properties; heat-treatments; recrystallization |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 07 Sep 2020 06:51 |
Last Modified: | 29 Aug 2021 00:38 |
Status: | Published |
Publisher: | Springer International Publishing |
Series Name: | Minerals, Metals & Materials Series |
Refereed: | Yes |
Identification Number: | 10.1007/978-3-030-51834-9_99 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:165130 |